William s



W. S. HAMM.

LAMP CHIMNEY HOLDER.

APPLICATION FILED AUG.27, 1918.

1 ,3 1 9,3 90. Patented Oct. 21, 1919.

UNITED STATES PATENT OFFICE.

' WILLIAM S, I-IAlVIlVI, 0F HUBBARD WOODS, ILLINOIS, ASSIGNOR TO THE ADAMS.&

WESTLAKE 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

' LAMP-CHIMNEY HOLDER.

Specification of Letters Patent.

Patented Oct. 21, 1919.

Application filed August 27, 1918. Serial No. 251,601.

To allwahom it may concern:

Be it known that I, WILLIAM S. HAMM, a citizen of the United States, and resident of Hubbard Woods, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Lamp-Chimney Holders, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to chimney holders associated with the burners of lamps, and is particularly adapted for use in connection with switch and signal lamps, and in other situations in which the lamp is subjected to violent and abrupt movements, as when mounted on vehicles.

The invention is illustrated in connection with the so-called long-time burner of a switch lamp, with which there is used a short cylindrical chimney having an annular shoulder, usually taking the form of one wall of a groove. Switch lamps are subjected to sudden and violent due to the manipulation of the switch or to the vibra tion of the switch-stand, caused by passing trains. Such jars are liable to throw the chimney out of the holder unless it is firmly secured, sometimes toppling it over and sometimes causing it to bounce vertically. While it thus becomes necessary to firmly secure the chimney, it is equally important that it be readily removable for the purpose of trimming the lamp, and when used on a semaphore tower the trimmer may have but one hand at his disposal.

The desired objects are secured by the in vention hereinafter described and illustrated in the accompanying drawings, in which Figures 1 and 2 are side elevations of the burner and chimney;

Fig. 3 is a plan section taken through the chimney immediately above the holder; and

Fig. 4: is a plan section of the burner with the chimney removed, the holder being shown as expanded.

The burner 10 is of any preferred form provided with the usual gallery 11, upon which the lower end of the chimney rests and from the inner margin of which rise a plurality of centering lugs 12.

The holder, generally designated by the numeral 13, is formed of spring wire, preferably of a single piece, bent to form, midway of its ends, an upstanding loop 14 which is secured to the gallery by means of a lip 15, formed integrally therewith, folded clownwardly and inwardly to constitute an eye. The two arms 16, 17, of the wire are crossed at the upper end of the loop 14 and bent to approximately semi-circular form, each, however, extending through somewhat more than 180 degrees. Their free ends are bent outwardly to form approximately radial arms 18, 19, and then downwardly to form fingers 20, 21, which'project through a slot 22, approximately concentric with the chimney and formed in an outstanding lip 23 of the gallery, the lower ends of thesefingers being bent outwardly, as shown at 24, 25, to form feet for engaging under the outer portion of the lip 23.

The chimney 26 is shown as of cylindrical form and as being provided near its lower end with an annular channel 27, within which the two arms of the holder enter by the spring action of the wire. In order to enter the chimney into the holder the fingers 20, 21, are forced together, thereby expanding the body of the holder, and is securely held by the spring grip of the holder when the fingers are permitted to separate.

In order to positively lock the chimney to the burner the slot 22 may be provided with lateral recesses 28, 29, in its outer margin adjacent its ends, for receiving the fingers 20, 21. It is not essential that these recesses have abrupt or shouldered margins, as any indentation or configuration which will increase the frictional engagement of the fingers with the gallery will sufice. In order to secure the holder in open position, as in Fig. 4, the outer margin of the aperture 22 is recessed near its middle portion, as shown at 30, to form shoulders for engaging the fingers 20, 21, when they are forced together.

For convenience of manipulation a strut 31 is placed across the slot 22 midway of its ends, thereby insuring the engagement by both fingers 20, 21, with the recess 30.

The crossing of the arms 16, 17, at the top of the loop 14 insures their engagement with the chimney throughout its entire circumference, and removes all danger of its fracture by unequal expansion and contraction. The engagement of the loop 14 with the eye 15 provides for a hinge action, permitting the overturning of the chimney, if desired, by disengaging the fingers 20, 21, from the gallery slot with which they cooperate. Or-

dinarily, however,in trimming the lamp the fingers are pinched'together to engage them with the recess 30, and the chimney out of the holder.

I claim as my invention 1. In combination, a lamp burner having a gallery provided with a circumferentially disposed slot, a chimney holder formed of spring wire bent to form an upstanding loop and bowed arms for encircling the chimney, the loop being secured to the gallery and the outer ends of the arms being crossed and out wardly extended and bent downward to engage the gallery slot. 7 V

2. In combination, a lamp burner having a gallery provided with a circumferentially disposed slot, such slot having an outwardly extending recess midway of its ends, a chimney holder formed of spring wire bent to encircle the chimney, the middle portion of the wire being formed into a crossed and downwardly turned loop secured to the gallery and the ends of the wire being crossed and bent downward to form fingers projecting throughthe slot and to engage the recess when forced together. 7

is lifted 3. In combination, a lamp burner having a gallery provided with a circumferentially disposed slot, such slot having an outwardly extending recess midway of its ends, a chimney holder formed of spring wire bent to encircle the chimney, the middle portion of the wire being formed into a crossed and downwardly turned loop secured to the gallery and the ends of the wire being crossed and bent downward to form fingers projecting through the slot and to engage the recess when forced together, the downturned portions of the wire being bent outwardly to form feet engaging under the gallery.

4. In combination, a burner having a gallery provided with a circumferentially slotted plate .a chimney holder comprising a pair of spring wire arms bent to conform to the curvature of the chimney and eacheX- tending through more than 180 degrees, the two arms being crossed at both ends and at one end being secured to the burner and at the other end being bent outward and downwardto form fingers for enteringthe slot.

WILLIAM s. HAMM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

